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WO2013042164A1 - Accumulateur - Google Patents

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Publication number
WO2013042164A1
WO2013042164A1 PCT/JP2011/005316 JP2011005316W WO2013042164A1 WO 2013042164 A1 WO2013042164 A1 WO 2013042164A1 JP 2011005316 W JP2011005316 W JP 2011005316W WO 2013042164 A1 WO2013042164 A1 WO 2013042164A1
Authority
WO
WIPO (PCT)
Prior art keywords
current
auxiliary terminal
secondary battery
terminal
power generation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2011/005316
Other languages
English (en)
Japanese (ja)
Inventor
瑞穂 松本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to US14/346,165 priority Critical patent/US20140234674A1/en
Priority to DE112011105637.0T priority patent/DE112011105637T5/de
Priority to JP2013534458A priority patent/JP5673838B2/ja
Priority to CN201180073548.3A priority patent/CN103814462B/zh
Priority to PCT/JP2011/005316 priority patent/WO2013042164A1/fr
Publication of WO2013042164A1 publication Critical patent/WO2013042164A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/578—Devices or arrangements for the interruption of current in response to pressure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention is a secondary battery provided with a current interruption mechanism that interrupts a current path inside the secondary battery.
  • Patent Document 1 a current interruption mechanism is provided inside the secondary battery.
  • the current is interrupted by deformation of the metal plate included in the current interrupt mechanism. Since the current interrupting mechanism is connected to the electrode terminal, charging and discharging through the electrode terminal is prohibited when the current interrupting mechanism interrupts the current.
  • the electric energy stored in the secondary battery cannot be taken out from the electrode terminal. Since the current interruption mechanism is activated by overcharging the secondary battery, a lot of electric energy is stored in the secondary battery.
  • the secondary battery according to the present invention includes a power generation element that performs charging and discharging, a battery case that houses the power generation element, and an electrode terminal that is exposed on the outer surface of the battery case and is electrically connected to the power generation element. Further, the secondary battery has a current interruption mechanism and an auxiliary terminal. The current interrupting mechanism is provided on the current path connecting the power generation element and the electrode terminal inside the battery case, and can interrupt the current. The auxiliary terminal is electrically connected to a current path located between the power generation element and the current interruption mechanism in the current path, and is exposed on the outer surface of the battery case.
  • the secondary battery has a positive electrode terminal and a negative electrode terminal
  • the electrode terminal in the present invention is at least one of the positive electrode terminal and the negative electrode terminal.
  • the power generating element can be discharged using the auxiliary terminal. Specifically, by connecting the auxiliary terminal to the load, a current can be passed to the load. By discharging the power generation element, it is possible to prevent electric energy from being stored in the power generation element.
  • the current interruption mechanism can be irreversibly changed from a conduction state to a state in which current is interrupted. As a result, when the current interrupting mechanism is activated, the current can be maintained in the interrupted state.
  • a valve that deforms in response to an increase in the internal pressure of the battery case can be used. When the secondary battery is overcharged, gas is generated inside the battery case, and the internal pressure of the battery case increases. The current path can be cut off by deforming the valve in response to an increase in the internal pressure of the battery case.
  • the present invention is particularly effective in a configuration in which a current interruption mechanism (including the above-described valve) must be disposed inside the battery case.
  • a through-hole used for injecting the electrolyte can be formed.
  • An auxiliary terminal can be used as a member that closes the through hole.
  • the auxiliary terminal has a function of discharging the power generation element and a function of closing the through hole.
  • a blind rivet can be used as the auxiliary terminal.
  • the auxiliary terminal can be covered with a cover.
  • an uneven portion can be formed in a region (exposed region) exposed on the outer surface of the battery case.
  • the concavo-convex portion can be constituted by, for example, a screw groove.
  • the battery case can be composed of a case body formed in a shape along a rectangular parallelepiped, and a lid that forms a housing space for the power generation element together with the case body.
  • the case main body has an opening for incorporating the power generation element, and the lid closes the opening of the case main body.
  • the electrode terminal and the auxiliary terminal can be fixed to the lid.
  • the auxiliary terminal can be disposed on the outer edge side of the lid with respect to the electrode terminal.
  • Example 1 It is an external view of a secondary battery. It is a figure which shows the internal structure of a secondary battery. It is an expanded view of an electric power generation element. It is a side view of a power generation element.
  • Example 1 it is a figure which shows the structure of a part of secondary battery in use condition.
  • Example 1 it is a figure which shows the structure of a part of secondary battery in an electric current interruption state.
  • Example 1 it is a figure which shows the structure of a part of secondary battery.
  • 6 is a diagram illustrating a partial structure of a secondary battery that is Example 2.
  • FIG. FIG. 10 is a diagram illustrating an auxiliary terminal in a modification example of Example 2. It is a figure which shows the auxiliary terminal in the other modification of Example 2.
  • FIG. 10 is a diagram illustrating an auxiliary terminal in a modification example of Example 2. It is a figure which shows the auxiliary terminal in the other modification of Example 2.
  • FIG. 1 is an external view of a secondary battery according to this embodiment.
  • FIG. 2 is a schematic diagram showing the internal structure of the secondary battery.
  • the secondary battery 1 for example, a lithium ion secondary battery or a nickel metal hydride battery is used.
  • the secondary battery 1 can be used, for example, as a power source for running the vehicle. Specifically, by supplying the electric power of the secondary battery 1 to the motor / generator, the motor / generator can generate kinetic energy for running the vehicle.
  • the secondary battery 1 includes a battery case 10 and a power generation element 30 accommodated in the battery case 10.
  • the battery case 10 has a case body 11 and a lid 12 and can be formed of a metal such as aluminum.
  • the case main body 11 has an opening for incorporating the power generation element 30 into the case main body 11, and the lid 12 closes the opening of the case main body 11.
  • the lid 12 is fixed to the case body 11 by welding or the like, and the inside of the battery case 10 is in a sealed state.
  • an electrolytic solution is accommodated in the battery case 10.
  • the battery case 10 is formed in a shape along a rectangular parallelepiped, and the secondary battery 1 is a so-called square battery.
  • the lid 12 is provided with a valve 13. By engraving the lid 12, the valve 13 can be formed.
  • the valve 13 is used for discharging gas generated inside the battery case 10 to the outside of the battery case 10.
  • gas is generated inside the battery case 10 and the internal pressure of the battery case 10 increases, the valve 13 changes from the closed state to the open state.
  • the pressure when the valve 13 is changed from the closed state to the open state (operating pressure of the valve 13) can be appropriately set in consideration of the pressure resistance performance of the battery case 10 and the like.
  • the negative terminal (electrode terminal) 21 and the positive terminal (electrode terminal) 22 are fixed to the lid 12.
  • the negative electrode terminal 21 and the positive electrode terminal 22 have a portion located outside the battery case 10 and a portion located inside the battery case 10.
  • the negative electrode tab 23 is accommodated in the battery case 10 and is connected to the negative electrode terminal 21 and the power generation element 30.
  • the positive electrode tab 24 is accommodated in the battery case 10 and is connected to the positive electrode terminal 22 and the power generation element 30.
  • FIG. 3 is a developed view of a part of the power generation element 30.
  • the power generation element 30 is an element that performs charging and discharging.
  • the power generation element 30 includes a negative electrode plate 31, a positive electrode plate 32, and a separator 33.
  • the negative electrode plate 31 has a current collector plate 31a and a negative electrode active material layer 31b.
  • the negative electrode active material layer 31b is formed on the surface of the current collector plate 31a, and is formed on both surfaces of the current collector plate 31a.
  • the negative electrode active material layer 31 b is formed in a partial region of the current collector plate 31 a, and the current collector plate 31 a is exposed at one end of the negative electrode plate 31.
  • the negative electrode active material layer 31b includes a negative electrode active material, a conductive material, a binder, and the like.
  • the current collecting plate 31a can be formed of copper, for example.
  • the positive electrode plate 32 has a current collector plate 32a and a positive electrode active material layer 32b.
  • the positive electrode active material layer 32b is formed on the surface of the current collector plate 32a and is formed on both surfaces of the current collector plate 32a.
  • the positive electrode active material layer 32 b is formed in a partial region of the current collector plate 32 a, and the current collector plate 32 a is exposed at one end of the positive electrode plate 32.
  • the positive electrode active material layer 32b includes a positive electrode active material, a conductive material, a binder, and the like.
  • the positive electrode active material examples include LiCoO 2 , LiMn 2 O 4 , LiNiO 2 , LiFePO 4 , Li 2 FePO 4 F, LiCo 1/3 Ni 1/3 Mn 1/3 O 2 or may be used Li (Li a Ni x Mn y Co z) O 2.
  • the current collector plate 32a can be formed of aluminum, for example.
  • the separator 33 is disposed between the negative electrode plate 31 and the positive electrode plate 32 and is in contact with the negative electrode active material layer 31b and the positive electrode active material layer 32b.
  • the electrolytic solution soaks into the separator 33, the negative electrode active material layer 31b, and the positive electrode active material layer 32b.
  • the power generation element 30 has two separators 33, and a positive electrode plate 32 is disposed between the two separators 33.
  • FIG. 4 is a side view of the power generation element 30 when viewed from the side to which the negative electrode tab 23 is connected.
  • the negative electrode tab 23 is welded to the portion around which the current collector plate 31a is wound, as shown in FIG. ing.
  • the negative electrode tab 23 can be formed of the same material as that of the current collector 31a. Thereby, the negative electrode tab 23 and the current collecting plate 31a can be easily welded.
  • the positive electrode plate 32 At the other end of the power generation element 30, only the positive electrode plate 32 (particularly, the current collector plate 32a) is wound, and the positive electrode tab 24 is welded to the portion where the current collector plate 32a is wound.
  • the positive electrode tab 24 can be formed of the same material as that of the current collector plate 32a. Thereby, the positive electrode tab 24 and the current collecting plate 32a can be easily welded.
  • the method for connecting the negative electrode tab 23 and the positive electrode tab 24 to the power generation element 30 may be a method other than welding.
  • the negative electrode active material layer 31b and the positive electrode active material layer 32b face each other with the separator 33 interposed therebetween.
  • ions move between the negative electrode active material layer 31b and the positive electrode active material layer 32b.
  • the secondary battery 1 as a lithium ion secondary battery when the secondary battery 1 as a lithium ion secondary battery is discharged, a chemical reaction that releases lithium ions and electrons is performed in the negative electrode active material layer 31b.
  • a chemical reaction that absorbs lithium ions and electrons is performed in the positive electrode active material layer 32b.
  • a chemical reaction that absorbs lithium ions and electrons is performed in the negative electrode active material layer 31b.
  • a chemical reaction that releases lithium ions and electrons is performed.
  • the gas is generated inside the secondary battery 1 (battery case 10) due to the overcharge of the secondary battery 1.
  • This gas is generated by, for example, thermal decomposition of the electrolytic solution. Since the inside of the battery case 10 is in a sealed state, the internal pressure of the battery case 10 increases due to the generation of gas.
  • the secondary battery 1 has a current cutoff valve. The current cutoff valve operates when the internal pressure of the battery case 10 rises, and cuts off a current path used for charging / discharging the secondary battery 1. Thereby, the overcharge of the secondary battery 1 etc. can be prevented.
  • FIG. 5 is a cross-sectional view showing a partial structure of the secondary battery 1.
  • the negative electrode terminal 21 has a terminal body 211, a terminal base 212, a terminal lead 213, and a fixing member 214.
  • the terminal body 211 is connected to a load or connected to another secondary battery 1.
  • a bus bar is connected to the terminal body 211.
  • the bus bar is used to connect a plurality of secondary batteries 1 in series or in parallel.
  • the terminal body 211 is attached to the terminal base 212, and the terminal base 212 is fixed to the lid 12.
  • the terminal base 212 is formed of an insulating material such as resin.
  • One end of the terminal lead 213 is connected to the terminal body 211, and the other end of the terminal lead 213 is connected to the fixing member 214.
  • the terminal lead 213 is made of a conductive material such as metal.
  • An insulator is disposed between the terminal lead 213 and the lid 12, and the terminal lead 213 and the lid 12 are in an insulated state.
  • a resin such as PFA (tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer) or PPS (polyphenylene sulfide) can be used.
  • the fixing member 214 is made of a conductive material such as metal and penetrates the lid 12. An insulator is disposed between the fixing member 214 and the lid 12. The fixing member 214 and the lid 12 are in an insulated state.
  • a part of the fixing member 214 located outside the battery case 10 is connected to the terminal lead 213.
  • caulking can be used.
  • a part of the fixing member 214 located inside the battery case 10 is connected to the current cutoff valve 25.
  • welding can be used.
  • the current cutoff valve 25 is made of a conductive material such as metal and has a bent portion 25a.
  • the bent portion 25 a is connected to the negative electrode tab 23.
  • welding can be used as a method for connecting the bent portion 25a and the negative electrode tab 23, for example.
  • the lid 12 has a through hole 12a, and an auxiliary terminal 26 is inserted into the through hole 12a.
  • the auxiliary terminal 26 is made of a conductive material such as metal.
  • One end 26 a of the auxiliary terminal 26 protrudes toward the outside of the battery case 10, and the other end 26 b of the auxiliary terminal 26 protrudes toward the inside of the battery case 10.
  • An insulator 27 is provided between the auxiliary terminal 26 and the through hole 12a.
  • the insulator 27 can be formed of, for example, resin or rubber. By disposing the insulator 27 between the auxiliary terminal 26 and the through hole 12a, the auxiliary terminal 26 and the lid 12 can be insulated. Further, by elastically deforming the insulator 27, the space between the auxiliary terminal 26 and the through hole 12a can be sealed.
  • the end 26 b of the auxiliary terminal 26 is connected to the negative electrode tab 23.
  • a method for connecting the auxiliary terminal 26 and the negative electrode tab 23 for example, caulking or welding can be used. If the auxiliary terminal 26 is formed using the same material as the material of the negative electrode tab 23, for example, the negative electrode tab 23 and the auxiliary terminal 26 can be easily welded.
  • the auxiliary terminal 26 is located adjacent to the negative electrode terminal 21 and is disposed on the outer edge side of the lid 12 with respect to the negative electrode terminal 21. The auxiliary terminal 26 can be connected to the negative electrode tab 23 after being fixed to the lid 12.
  • the position where the auxiliary terminal 26 is arranged is not limited to the position shown in FIG. 5 and can be set as appropriate. That is, it is only necessary that the auxiliary terminal 26 is disposed at a position where it can be connected to the negative electrode tab 23.
  • the auxiliary terminal 26 can be disposed on the positive electrode terminal 22 side (left side in FIG. 5) with respect to the negative electrode terminal 21.
  • the auxiliary terminal 26 is preferably arranged at the position shown in FIG.
  • the auxiliary terminal 26 By arranging the auxiliary terminal 26 at the position shown in FIG. 5, it becomes easy to access the auxiliary terminal 26 from the outside of the assembled battery. For example, as will be described later, when the auxiliary terminal 26 is connected to a load, the wiring is easily connected to the auxiliary terminal 26. If the auxiliary terminal 26 is disposed on the positive electrode terminal 22 side with respect to the negative electrode terminal 21, the presence of the negative electrode terminal 21 may make it difficult to access the auxiliary terminal 26 from the outside of the assembled battery. According to the present embodiment, since the auxiliary terminal 26 is arranged at the corner of the battery case 10, the auxiliary terminal 26 can be easily accessed.
  • the auxiliary terminal 26 can be easily attached by arranging the auxiliary terminal 26 at the position shown in FIG. If the auxiliary terminal 26 is disposed on the positive electrode terminal 22 side with respect to the negative electrode terminal 21, when the auxiliary terminal 26 is attached, it may be difficult to attach the auxiliary terminal 26 due to interference with the negative electrode terminal 21. In this embodiment, since the auxiliary terminal 26 is disposed on the outer edge side of the lid 12 with respect to the negative electrode terminal 21, the auxiliary terminal 26 can be attached without interfering with the negative electrode terminal 21.
  • the auxiliary electrode 26 can support the negative electrode tab 23 by connecting the auxiliary terminal 26 to the negative electrode tab 23.
  • the vibration or impact is also transmitted to the negative electrode tab 23.
  • a load may be applied to a connection portion between the negative electrode tab 23 and the current cutoff valve 25, or a load may be applied to a connection portion between the negative electrode tab 23 and the power generation element 30. Further, the vibration is transmitted to the current cutoff valve 25 via the negative electrode tab 23, and there is a possibility that a load is applied to the current cutoff valve 25.
  • the auxiliary electrode 26 supports the negative electrode tab 23, so that vibration of the negative electrode tab 23 and the like can be suppressed. Thereby, it can suppress that load is applied to the current cutoff valve 25 or the like.
  • the internal pressure of the battery case 10 increases.
  • the pressure P acts on the current cutoff valve 25.
  • the connection portion between the current cutoff valve 25 and the negative electrode tab 23 is broken by the deformation of the current cutoff valve 25, and the current cutoff valve 25 is separated from the negative electrode tab 23.
  • the current cutoff valve 25 changes to the state shown in FIG. 6, it is maintained in the state shown in FIG. That is, the current cutoff valve 25 changes irreversibly from the state shown in FIG. 5 to the state shown in FIG. Thereby, the state which interrupted
  • the pressure P when operating the current cutoff valve 25 can be appropriately set in consideration of the pressure resistance performance of the battery case 10 and the like.
  • the secondary battery 1 Since the current cutoff valve 25 and the negative electrode tab 23 serve as a current path when charging and discharging the secondary battery 1 using the negative electrode terminal 21, the secondary battery 1 is separated when the current cutoff valve 25 is separated from the negative electrode tab 23. Charging / discharging is prohibited. By prohibiting the charging / discharging of the secondary battery 1, it is possible to prevent the secondary battery 1 from being overcharged and to suppress further increase in the internal pressure of the battery case 10.
  • the secondary battery 1 After the current cutoff valve 25 is activated, the secondary battery 1 cannot be discharged using the negative terminal 21. When the current cutoff valve 25 operates, the secondary battery 1 is in an overcharged state, so that much electric energy remains stored in the power generation element 30.
  • the auxiliary terminal 26 by using the auxiliary terminal 26, the electric energy stored in the power generation element 30 can be output to the outside of the secondary battery 1. Even after the current cutoff valve 25 is separated from the negative electrode tab 23, the auxiliary terminal 26 is connected to the power generation element 30 through the negative electrode tab 23. For this reason, if the auxiliary terminal 26 and the positive electrode terminal 22 are connected to a load, the power generating element 30 can be discharged.
  • the load may be anything that consumes the power of the power generation element 30.
  • a current can simply be passed to the resistor as a load.
  • an electronic device can be operated using the electric power of the electric power generation element 30 using an electronic device as a load.
  • the temperature of the power generation element 30 can be adjusted using the auxiliary terminal 26. Since the auxiliary terminal 26 is connected to the power generation element 30 via the negative electrode tab 23, the temperature of the power generation element 30 can be adjusted by adjusting the temperature of the auxiliary terminal 26.
  • the heat of the power generation element 30 is transmitted not only to the negative electrode terminal 21 but also to the auxiliary terminal 26 and releases heat from the negative electrode terminal 21 and the auxiliary terminal 26 to the atmosphere. Can do. If a fin is provided at the end portion 26a of the auxiliary terminal 26, the heat dissipation of the auxiliary terminal 26 can be improved.
  • the heat exchange medium for cooling can be brought into contact with the auxiliary terminal 26.
  • Gas or liquid can be used as the heat exchange medium. If the auxiliary terminal 26 is cooled using the heat exchange medium, the power generation element 30 can be cooled via the negative electrode tab 23, and the temperature increase of the power generation element 30 can be suppressed. If a fin is provided at the end portion 26a of the auxiliary terminal 26, the cooling efficiency of the auxiliary terminal 26 can be improved.
  • a heat exchange medium for heating can be brought into contact with the auxiliary terminal 26. If the auxiliary terminal 26 is warmed, the power generation element 30 can be warmed via the negative electrode tab 23, and the temperature drop of the power generation element 30 can be suppressed. If a fin is provided at the end portion 26a of the auxiliary terminal 26, the heat receiving efficiency of the auxiliary terminal 26 can be improved, and the power generating element 30 can be efficiently heated.
  • the auxiliary terminal 26 is used after the current cutoff valve 25 is activated. For this reason, when charging / discharging the secondary battery 1 using the negative electrode terminal 21, the auxiliary terminal 26 can be covered with the cover 28, as shown in FIG.
  • the cover 28 can be formed of an insulating material.
  • auxiliary terminal 26 a part of the auxiliary terminal 26 exposed to the outside of the battery case 10 can be covered with the cover 28.
  • the cover 28 may be removed.
  • the cover 28 only needs to cover the auxiliary terminal 26.
  • an insulating tape as the cover 28 may be simply attached to the auxiliary terminal 26.
  • the shape of the auxiliary terminal 26 exposed to the outside of the battery case 10 can be formed in a shape that makes it easy to attach a wiring used for connection with a load.
  • irregularities can be formed on the outer surface of the auxiliary terminal 26.
  • the uneven surface can be constituted by, for example, a screw groove.
  • a part (end portion 26a) of the auxiliary terminal 26 protrudes outside the battery case 10, but the auxiliary terminal 26 does not need to protrude outside the battery case 10.
  • the auxiliary terminal 26 shown in FIG. 8 can be used.
  • the end surface of the auxiliary terminal 26 is disposed along the outer surface of the lid 12, and the auxiliary terminal 26 does not protrude outside the battery case 10. Since the auxiliary terminal 26 is used for connection with a load, the auxiliary terminal 26 is exposed to the outside of the battery case 10.
  • the auxiliary terminal 26 has a groove 26c.
  • the wiring used for connection with the load can be inserted into the groove 26c, and the wiring and the auxiliary terminal 26 can be connected.
  • a screw groove is formed on the inner wall surface of the groove 26c, the wiring and the auxiliary terminal 26 can be easily connected.
  • a thread groove that meshes with the thread groove of the groove 26c can be provided at the end of the wiring.
  • the auxiliary terminal 26 can be covered with the cover 28 when the secondary battery 1 is charged and discharged using the negative electrode terminal 21. Since the auxiliary terminal 26 does not protrude to the outside of the battery case 10, when an insulating tape is used as the cover 28, it becomes easy to apply the insulating tape.
  • the auxiliary terminal 26 is attached to the lid 12, but the auxiliary terminal 26 can be attached to the case body 11.
  • the connection position of the auxiliary terminal 26 and the negative electrode tab 23 is not limited to the position shown in FIG. Specifically, the connection position of the auxiliary terminal 26 and the negative electrode tab 23 may be between the connection position of the current cutoff valve 25 and the negative electrode tab 23 and the connection position of the negative electrode tab 23 and the power generation element 30. Thereby, even after the current cutoff valve 25 is separated from the negative electrode tab 23, the power generation element 30 can be discharged using the auxiliary terminal 26.
  • the current cutoff valve 25 is provided for the negative terminal 21, but the current cutoff valve 25 may be provided for the positive terminal 22. Since the positive electrode terminal 22 has the same structure as that of the negative electrode terminal 21, the same structure as that of the present embodiment can be adopted when the current cutoff valve 25 is provided on the positive electrode terminal 22.
  • the current cutoff valve 25 may be provided on at least one of the negative electrode terminal 21 and the positive electrode terminal 22.
  • the current cutoff valve 25 is used as a mechanism for cutting off the current, but the present invention is not limited to this.
  • the current interrupting mechanism only needs to be able to interrupt the current path between the negative electrode terminal 21 (or the positive electrode terminal 22) and the power generation element 30.
  • the current is cut off by deforming the current cut-off valve 25, but the current can also be cut off using a fuse or the like. For example, when an overcharge of the secondary battery 1 is detected, a current can be passed through the fuse to blow the fuse.
  • the current cutoff valve 25 is irreversibly changed from the conductive state to the current cutoff state, but the present invention is not limited to this. That is, the current cutoff valve 25 may be switched between a conduction state and a current cutoff state. Even in this case, if the current cutoff valve 25 is maintained in the current cutoff state, charging and discharging of the secondary battery 1 using the negative electrode terminal 21 may be prohibited after the secondary battery 1 is overcharged. it can. When the current cutoff valve 25 is in the current cutoff state, the power generation element 30 can be discharged using the auxiliary terminal 26.
  • FIG. 9 is an enlarged view illustrating a partial configuration of the secondary battery, and corresponds to FIG. 5 of the first embodiment.
  • the same members as those described in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
  • differences from the first embodiment will be mainly described.
  • the lid 12 has a through hole 12b.
  • the through hole 12 b is used for injecting the electrolyte into the battery case 10.
  • the electrolytic solution is injected into the battery case 10.
  • the electrolytic solution can be impregnated into the separator 33 and the active material layers 31b and 32b.
  • the auxiliary terminal 40 is made of a conductive material such as metal. Since the auxiliary terminal 40 is connected to the negative electrode tab 23 as will be described later, the auxiliary terminal 40 can be formed of the same material as the material of the negative electrode tab 23.
  • An insulator 43 is disposed between the auxiliary terminal 40 and the lid 12, and the auxiliary terminal 40 and the lid 12 are in an insulated state.
  • the auxiliary terminal 40 As the auxiliary terminal 40, a blind rivet can be used.
  • the auxiliary terminal 40 as a blind rivet has a rivet body 41 and a shaft 42.
  • the shaft 42 is disposed inside the rivet body 41. Both ends 41 a and 41 b of the rivet body 41 are crimped and extend in a direction along the lid 12.
  • the end 41a of the rivet body 41 has a size that can pass through the through hole 12b before the auxiliary terminal 40 is crimped. After passing the end portion 41a of the rivet body 41 through the through hole 12b, the end portion 41b can be formed into the shape shown in FIG. 9 by caulking the end portion 41b of the rivet body 41.
  • the end portion 41a of the rivet body 41 is crimped by sliding the shaft 42 to form the end portion 41a into the shape shown in FIG. it can.
  • the shaft 42 protrudes from the rivet main body 41, and the shaft 42 can be slid by pulling the protruding portion of the shaft 42.
  • the shaft 42 Since the shaft 42 has the flange portion 42a, the end portion 41a of the rivet body 41 is deformed by the movement of the flange portion 42a accompanying the slide of the shaft 42, and is formed in the shape shown in FIG. After the shaft 42 is slid, the shaft 42 is cut.
  • the shaft 42 shown in FIG. 9 shows the shaft after cutting.
  • the through hole 12b can be sealed by caulking both ends 41a and 41b of the rivet body 41. As shown in FIG. 9, both ends 41 a and 41 b of the rivet body 41 sandwich the lid 12 and the negative electrode tab 23. Thereby, the negative electrode tab 23 can be fixed to the auxiliary terminal 40.
  • An insulator 43 is disposed between the negative electrode tab 23 and the lid 12, and the negative electrode tab 23 and the lid 12 are in an insulated state. The negative electrode tab 23 is held by the insulator 44 and is disposed along the lid 12.
  • the insulator 43 is disposed between the auxiliary terminal 40 and the lid 12, the airtightness between the auxiliary terminal 40 and the lid 12 can be secured by elastically deforming the insulator 43.
  • a blind rivet is used as the auxiliary terminal 40, but the auxiliary terminal 40 is not limited to this. That is, it is only necessary that the through hole 12b can be blocked using the auxiliary terminal 40.
  • the auxiliary terminal 40 has a function of closing the through hole 12b used for injecting the electrolytic solution and a function of a terminal used for discharging the power generation element 30.
  • the auxiliary terminal 40 By providing the auxiliary terminal 40 with two functions, an increase in the number of parts can be suppressed and the cost can be reduced.
  • the auxiliary terminal 26 described in the first embodiment it is necessary to form a through hole 12a in the lid 12 for penetrating the auxiliary terminal 26 in addition to the through hole 12b used for injecting the electrolytic solution. In this embodiment, it is only necessary to form one through hole in the lid 12, and it is easy to ensure the sealing property of the battery case 10.
  • the auxiliary terminal 40 shown in FIG. 10 or FIG. 11 can be used. 10 and 11 show the auxiliary terminal 40 after caulking. As the auxiliary terminal 40, a blind rivet is used.
  • a screw groove 41 c is formed on the inner wall surface of the rivet body 41.
  • a screw groove 41 c is formed in the end 41 b of the rivet body 41.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Gas Exhaust Devices For Batteries (AREA)
  • Filling, Topping-Up Batteries (AREA)

Abstract

Le problème décrit par l'invention concerne le fait que la mise en œuvre d'un mécanisme de coupure de courant disposé à l'intérieur d'un accumulateur implique la présence d'un reste d'énergie électrique accumulée dans l'accumulateur. La solution selon l'invention consiste en un accumulateur comprenant : un élément générateur d'énergie qui exécute une charge et une décharge; un logement d'accumulateur qui loge l'élément générateur d'énergie; et un élément d'électrode qui est exposé sur la face extérieure du logement d'accumulateur et qui est connecté électriquement à l'élément générateur d'énergie. L'accumulateur comprend en outre un mécanisme de coupure de courant et une borne auxiliaire. L'élément de coupure de courant est disposé à l'intérieur du logement d'accumulateur sur un trajet de courant qui établit une connexion entre l'élément générateur d'énergie et la borne d'électrode, et est capable de couper le courant. La borne auxiliaire est connectée électriquement à l'intérieur du trajet du courant à un emplacement situé entre l'élément générateur d'énergie et le mécanisme de coupure de courant, et est exposé sur la face extérieure du logement d'accumulateur.
PCT/JP2011/005316 2011-09-21 2011-09-21 Accumulateur Ceased WO2013042164A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US14/346,165 US20140234674A1 (en) 2011-09-21 2011-09-21 Secondary battery
DE112011105637.0T DE112011105637T5 (de) 2011-09-21 2011-09-21 Sekundärbatterie
JP2013534458A JP5673838B2 (ja) 2011-09-21 2011-09-21 二次電池
CN201180073548.3A CN103814462B (zh) 2011-09-21 2011-09-21 二次电池
PCT/JP2011/005316 WO2013042164A1 (fr) 2011-09-21 2011-09-21 Accumulateur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2011/005316 WO2013042164A1 (fr) 2011-09-21 2011-09-21 Accumulateur

Publications (1)

Publication Number Publication Date
WO2013042164A1 true WO2013042164A1 (fr) 2013-03-28

Family

ID=47913982

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2011/005316 Ceased WO2013042164A1 (fr) 2011-09-21 2011-09-21 Accumulateur

Country Status (5)

Country Link
US (1) US20140234674A1 (fr)
JP (1) JP5673838B2 (fr)
CN (1) CN103814462B (fr)
DE (1) DE112011105637T5 (fr)
WO (1) WO2013042164A1 (fr)

Cited By (6)

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JP2014010967A (ja) * 2012-06-28 2014-01-20 Toyota Industries Corp 電流遮断装置を備えた蓄電装置、及びこれを複数備えた蓄電装置モジュール
JP2014035831A (ja) * 2012-08-07 2014-02-24 Toyota Motor Corp 密閉型電池
JP2014235943A (ja) * 2013-06-04 2014-12-15 シャープ株式会社 二次電池
CN104518187A (zh) * 2013-09-30 2015-04-15 株式会社杰士汤浅国际 蓄电元件
JP2016195014A (ja) * 2015-03-31 2016-11-17 株式会社Ｇｓユアサ 蓄電素子
JP2019145467A (ja) * 2018-02-23 2019-08-29 パナソニック株式会社 密閉型電池

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Publication number Priority date Publication date Assignee Title
DE102017204706A1 (de) * 2017-03-21 2018-09-27 Robert Bosch Gmbh Zelldeckel für eine Batteriezelle mit Schnellentladeeinheit

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JPH04106847U (ja) * 1991-02-27 1992-09-16 新神戸電機株式会社 自動車用鉛蓄電池
JPH06124698A (ja) * 1992-10-09 1994-05-06 Morimo Denki Kogyo:Yugen Ｒ・ｌ用スペア端子付蓄電池
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JP2011076829A (ja) * 2009-09-30 2011-04-14 Hitachi Vehicle Energy Ltd 扁平捲回式二次電池

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Publication number Priority date Publication date Assignee Title
JP2014010967A (ja) * 2012-06-28 2014-01-20 Toyota Industries Corp 電流遮断装置を備えた蓄電装置、及びこれを複数備えた蓄電装置モジュール
JP2014035831A (ja) * 2012-08-07 2014-02-24 Toyota Motor Corp 密閉型電池
JP2014235943A (ja) * 2013-06-04 2014-12-15 シャープ株式会社 二次電池
CN104518187A (zh) * 2013-09-30 2015-04-15 株式会社杰士汤浅国际 蓄电元件
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JP2019145467A (ja) * 2018-02-23 2019-08-29 パナソニック株式会社 密閉型電池

Also Published As

Publication number Publication date
US20140234674A1 (en) 2014-08-21
CN103814462B (zh) 2016-05-04
CN103814462A (zh) 2014-05-21
JPWO2013042164A1 (ja) 2015-03-26
JP5673838B2 (ja) 2015-02-18
DE112011105637T5 (de) 2014-08-28

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